Door-closer.



Patented Apr. 1,1919.

1 UNITED rATE T OFFICE- rememxxmenfcrsrA Foim;oolvnncriourjnssienon THE YALE & 'rownn MANUFACTURING co PAnY, on surelvrronn; ,QONNECTICUT.

To all whom it may concern Be it known that I,PEDERM1KKE1;SEN, a citizen of the United States, and a resident of Stamford, in the county of F-airfieldand of the invention, such as will enable others skilled in theart to which it appertains to make and-u'sethe same. 7 1 1 This invention relates to improvements "in door closers having means for normally holding the door-in openlposition, and par ticularly to means for releasing the door holding means in the event of a-fire, so; that the door will automatically close and assist in preventing the spread of'the fire by cutting off the draft 'and confining the fire to the room in; which it started; p v I =lVith this object in view-my invention consists in the parts and combination of parts and details of construction as'will be more fully explained and pointed out in the claims. l a In the accompanying drawings, Figure 1 is a view in section, part lyin-elevation of a portion of a doorcloser showing-my improve'ment appliedto the same. Fig; 2isa bottom plan view of the lever arm and the parts carried thereby. Fig. *3- is aview in transverse section through the lever arm, spring and bolt -holding devices. Figs. 4: andi5fare views-in plan and edge'elevation respectively of the two parts of the detachable seat'for'the bolt head, and Figs; 6, 7

and 8 are views of the sleeve, collar and bolt.

My improvement is designed for usewith door closers, or with combined checks I and closers, hence I would have it understood that I do not limit its use to either, and that bytheterm door closer asused in the specification, I intend to include combined checks and closers. I i

10 represents the casingof a door closer and 11 the spindle of thesame to which the leverarm 12 is secured, the said lever arm being adapted forcoiip'eration with] the mechanism of the door closer and with the door in the usual manner.

For the purpose of holding the door open, the lever arm is provided with a spring pressed dog, and the cap of the door closer with an upwardly projecting stop or rib which is engaged by the lower beveled end v Specification of Letters Patenti Application filed- August 26, 1918.

nooR-cLosER. j

p Pat nted Apr. 1, 1919. .serialNo. 251,458.

of the dog when the door is in its open position, the dog riding. over the stop during the openingmovement of the door and dropping behind the same when the door is fully open, the pressure of the spring against the dog being sufficient under normal condition to prevent the dog from risingout of contact with the stop. The dog 14 is mounted to move vertically inthe arm 12, and is providedwith a chisel or beveled lower end to engage the stop13 and with a head which limits its downward movement, and against which thefree end of the long flat spring 15 bears. .The headof the dog may be provided with'a rib formed on its top surface to enter a slot in. the spring-15 so asto prevent the dog from turning in itsseat, but any equivalent means may be employed for holding the fiat beveled lower end of the dog in a position to properly engage the side of the stop-13. V V

a .The spring. 15 is secured at one end to the lever arm 12 bya screw 17, or by a rivet if desired, with its free end in a position to bear on the head of-the dog 14. Passing upwardly from the underside of the arm 12, and through the latter and also through spring15, is thethreaded bolt 18 whichis locked in place by nut 19 screwed to the end of the bolt above the spring, and mounted on the head of the bolt is a collar 20 provided with a peripheral groove 21, the outer surface of the collar .below the groove beingpreferably inclined as shown. This collar fits over the head of the bolt, and the groove in the col lar. forms a seat for the two part detachable seat 22 'for the bolt head. i The. two. parts of thiswdetachable seat arepreferably made of sheet brass, and each'is provided with an enlarged. disk shaped end 22 and with an inwardly projecting hook shaped end 22*. The hook shaped ends of the seat membersproj ect inwardly so asto overlap and the hooks thereonturn in opposite directionsso asto interlock as shown in Fig. 1. The disk shaped ends22 'also project inwardly so as to overlap and are secured together by a fusible alloy which will melt at a comparatively Located mtermediate the underside oi the lever arm 12 and the top face of the detachable seat is the cylindrical spacing sleeve 23, the internal diameter of which is reater than the head of the bolt so that when the parts of the seat 22 separate, the sleeve will be free to fall thus leaving the bolt free to bepulled upwardly by the spring- 15'.

' In assembling the parts, the seat 22 is securedaround the collar 20 and the latter applied to the head 'of the bolt. The boltis then passed through the sleeve 23, lever arm 12 and spring 15, and is secured by the nut 19, the latter operating to not only regulate the tension at which the spring bearson the dog,hut alsoholds the seat and sleeve'fi-rm'l y in position. In the event of the proximity of heat sufficientto melt the alloy holding the two parts of the seat 22 together, the ups ward pull on the holt, due to the tension of the spring, will cause the two parts oft-he seat tobe disconnected by the expanding: ac tion of the gr-oovecteollar and fall, thus releasing the pacing sleeve and permitting itto drop also. This leaves the bolt free to mov e upwardly and release the spring thus permitting the free end of the spring to move away from" the belt, or beer so lightly thereon as to be overcome by the tension of the closingspringin the door check closer. 'As soon therefore as the bolt is re leased, the spring will also be released thus removing V altogether the pressure against the head of thedog or decreasing it to such an extent that it can be overcome by the'tension' of the closing spring 245 in the door check or closer.

It is evident that many slight changes might be resorted to in the relative arrang ment of parts shown and described without departing from the spirit arid scope of my invention, hence I would have it understood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described, but,-

Having fully described my invention what I claim as new and desire to secure by Let tors-Patent, is: t

1. The combination of a door closer, having a stop; a lever arm having a longitudinally mova'ble dog, a spring for yieldingly holding the dog in position to engage the stop, a bolt passing throughthe lever arm n spr n s tw part, seat e ng .o t head of the; bolt, the we at seat Held tog-eerie fusible alloy, and means resting on the said seat and bearing against the underside of the lever arm for holding, the bolt against movement while the seatremains intact.

, 2-. The-combination of a door closer having a stop, a lever arm, a dog, mounted in said lever arm, a spring secured toithe lever arm and beating, on theeog, a bolt passing through the lever me spring-a tension adjusting n-L'it on said bolt; a: two part seat the parts ofwhich are interlocked at one end andheld together bylfusible alloy at the other, the saidse'at resting; on the head of the-bolt," means-interposed between the lever arm and'seat and supported on; the latter for preventing? any movement of the bolt while the seat rema ns intact.

, 3; The combination of a doorol-oser having a stop, lever arm-, dog..,mounted the .le'ver arnr, a spring secured at one end to the lever arm and resting at its "tree end in a: position to engage the head of the dog,

' a bolt passing, th ugh the lever and spring and engaging the latter, ajtwo part seat resting the-head f: the: bolt the two parts of the seat being held together by fusible alloy and a sleevesupportedhy said seat and bearing against the underside of the lever arm. A j

4 The combination of a doorcloser having a stop, a lever arm, a dog carried by the lever rm, a spring secured one end to the lever arm and bearing a't' its other end itg'BJ-iilStjl-IQ-hGttdc df th' dog; a bolt passing upwardlythroug h the lever arm andspring and cai ryi ng nut for regulating the tension of the latter; two par-gt seat, the parts being interlockedatone end and secured by a fusible alloy at the; other endthe said seat resting on the head ofthe bolt, andspacing meansisupported on"- the seat bearing against the lever armjor normally holdintg. the' spring tension bolt against move- 1; L 2 g V;

In testimony whereoisl have signed this specification in the presence of two subscribing witnesses.

v renta witnesses.

Witnesses 3ml 0- s-mm, EARL STUDWELL. 

